Drill press



H. C. LEONARD AND H. E. WENSTROM. DRILL PRESS.

/ APPLICATION FILED JUNE 22, 1920. 1,432,027, Patented Oct. 17, 1922.

2 SHEETSSHEET I.

H. C. LEONARD AND H. E. WENSTROM.

DRILL PRESS.

APPLICATION FILED JUNE 22, 1920.

1,432,027. Patented Oct. 17, 1922.

2 SHEETS-SHEET 2.

t at

III

lit

Jlllllllllllll eaten. I

\j I I b l HERBERT C. LEONARD, OF ACUSHNET, AND HARRY E. WENSTBOM, OF NEW BEDFOED,

MASSACHUSETTS, ASSIGNORS .TO GEORGE L./SPRAGUE, OF NEW BEDJEORD, MASSA- CHUSETTS, AND WILLIAM A. REYNOLDSQXF FREETOWN, MASSACHUSETTS.

DRILL rnnss.

Application filed June 22,

e To all whom it may concern:

Be it known that We,-HERBERT C. LEON- ARD and HAnnY E. WnNsTRoM, citizens of the United States, residing at Acushnet and New Bedford, respectively, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Drill Presses, of which the following is a specification.

The present invention relates to drillpresses of the stationary type. The ordinary drill-press in common use is'of a cumbersome construction, expensive to install and unadapted to the uses of small shops, which are therefore forced to rely on the ordinary portable hand drill, which lacks the stability and accuracy necessary for certain kinds of work.

It is an object of the present invention to produce a drill-press adapted to the uses of the small shop, with which the motor of a portable drill may be used as the driving means, in which the accuracy and stability of the drill-press is obtained and which has a quick, accurate and positive action. Another object of the invention is .to so construct the device that the weight of the motor is supported otherwise than by the drill-bit.

In the accompanying drawings is illus tratgld, one embodiment of'the invention in whi a Figure 1 is a side elevation of the drill. Figure 2 is a section on line 2-2 of Figure 1 showing the opprating lever in detail. Figure 3 is an enlarged detail view of the suspension block. L

' Figure 4 shows the adaptation of the device to use with an emery-wheel.

Figure 5 is theadaptation of the device to a use in regrinding piston valves,

Figure 6 is an enlarged detail view of the adjusting means for the upper bracket arm.

Figure 7 is a detail view showing the sliding connection between the driving spindle and the drill spindle.

This invention will now be described in connection with the accompanying drawings, referring to the various details by reference numerals, the same numerals designating the same parts in all figures of the drawln s.

n a general way, the invention comprises 1920. Serial No. 390,754.

tion as a unit'andto permit vertical movement of the'drill spindle relative to the s indle 17, as will. be hereinafter set forth.

he spindle 18 is supported by a lever 19, by which it may be reciprocated up and down, and the spindle 17 is suitably formed atits upper end for connection with the motor of a portable drill or other suitable driving means.

The arms 14, 15 and 16 are attached to the rod 10 by means of split collars 20, 21

and 22 respectively, which permit adjustment' of the racket arms longitudinally and rotatively in relation to the rod 10. The collars. are provided with outstanding flanges 23 and 24 receiving clamping bolts 25 by which they'may be drawn up to grip the rod and hold the arms in adjusted position. v v

The bracket arm 15 is provided with an HPP'GI'JOIfiIlClI 26 and a lower branch 27, on the respective outer ends of which are sleeves 28 and 29. Spindle 17 is rotatably supported in the sleeve 28 and sleeve 29 acts as a guide for spindle 18. The spindle 17 is provided near its upper end with an outstanding flange 30, by means of which it is ac supported upon the sleeve '28 through inter- 'mediate ball-bearings 31, the bearing consisting of race-ways 32 and 33 between which the balls are confined. The upper end of the spindle 17 may be squared as at 34 or as otherwise suitably shaped to adapt it to fit into a socket in the motor drive shaft.

The drill spindle 18 is provided with a longitudinal bore opening at its upper end, into which the downwardly extending 1% spindle 17 is telescoped. The spindle 17 is provided with a longitudinal groove 35 in which a pin 36 projecting from the inner surface of the bore of spindle 18 is adapted to slide, preventing .relative rotary move- 10E"; ment of the spindles while permitting reciprocation of the drill, spindle. On the lower end of the drill spindle is-a' chuck 37 in which a suitable drill 38 or other tool may be carried.

The lever 19 by which the drill spindle 18 is supported is pivotally attached at one end to the branch arm 26 by a bolt 39 or other suitable means and is held normally in its raised position by means of springs 40, which are preferably two in number and are secured at one end to a pin 41 extending transversely through a projection 42 on arm 26 and at their other end to a slmilar pin 43 extending transversely through the lever arm. The lever is depressed against the force of these springs in carryin out the drilling operation and is automatically returned to its upper position by the springs when released by the operator.

On the outer end of the lever 19 is a handgrip 44 by which the lever may be depressed, and intermediate of the lever ends is a. yoke having parallel side members 45, having slots 46. Within the yoke and between the side members 45 is pivoted a centrally apertured suspension block 47 suspended. by means of pins 48 which extend into slots 46. The spindle 18 is supported in the aperture of the block 47 by means of an outstanding flange 49 formed on the spindle and restingon the upper face of theblock. By this arrangement of the suspension block sufficient play between the block 47 and lever 19 is provided to prevent binding of the spindles in their guide sleeves when the lever is oscillated.

On the outer end of the bracket arm 16 is a split sleeve 50, in which is mounted for vertical adjustment, a stem 51 which is attached to the lower face of a platen 52. Any

' suitable driving means may be used, in connection with the drill as an electric motor, a compressed-air motor or the like. In- Figure 1 of the drawings. the driving means for the drill-bit shown is anvelectric motor 53 of a portable hand-drill, which is shown as having the end of its rotor socketed to receive the squared end 34 of the spindle 17. The rotor is thus in alinement with the spindle 17 The weightot' the motor 53 is supported by the branch arm 26 which relieves thedrill-bit of too great pressure when the drillbit comes in contact with the work and the operator of the necessity of supporting the motor. l

By mounting the motor in this manner, the tendency to break drill-bits resulting from allowing the weight of the motor to rest on the drill is minimized. The motor is held on the end 34 of the spindle 17 by means of bracket 14. which isprovided with a split sleeve 54 on its outer end having a. suitable adjusting nut 55 ,for clamping the handle or other projection of the motor,

To accommodate the bracket 14 to motors one relative to the otheniu a horizontal di- 5 rection the sections being secured together by a bolt 58 extending through an aperture in one of the members and slidable in w slot 59 longitudinally arranged in the other member. Both the platen and the arm 16 are adjustable to bring the work into proper position relative to the drill and the arm ma be swung aside when desirable and the article to be drilled placed on the floor or other support as in the case of drilling holes in the ends of rods or other like objects. The platen may also be removed from the sleeve 50 altogether and replaced by a suitable center 60 (see Figures 4 and 5) and a grinding tool as anemery-wheel 61 may be mounted between the center 60 and the chuck 37, or a. piston valve (52 may be mounted therebetween (see Figure 5,) for regrinding when worn. The sleeve 29 is split and provided with flanges 63 and 64 through which passes an adjusting orclamping bolt 65. The lever arm 19 may be clamped in fixed position by means of a clamping nut 66 screwthreaded on. to the end of the bolt 39.

When the drill spindle is operated, the suspension block 47 has a tendency to turn wit iin the yoke in a plane at right angles to the axis of the spindle 18, with a consequent binding of the block 47 between the side members 45. Turning ot' the block" in a plane at right angles to the axis of the spindle 18 may be prevented by properly machining and truing the block to snugly fit the inner faces of the side members 45. This however is an expensive and time consuming operation. To overcome these objections in an inexpensive manner the block 47 is provided with a projecting tongue 47 which extends into and is adapted to ride in a slot 19 formed in the lever arm and communicating with the opening in the yoke. By this construction oscillation of the block 47 on pins 48 is permitted while turning of the block in a plane at right angles to the axis of the spindle is prevented.

In the machine, as set forth above, a drillpress is provided having a quick positive action, which is cheap and simple of construction and which provides for a direct drive between the driving spindle and the motor; eliminating all gears, belts and like mechanism, likely to get out of order and expensive of replacement. By means of this device the portable hand-drill is adapted to the uses of a drill-press securing all "the ad vantages of a mechanically guided tool, The adaptability of the machine to many uses and its simple, cheap construction adapt it to the needs of a small shop.

Having thus explained the nature of our *tached to the end of the drive said itivention and described a wa of making and using the same, althoug without attempting to set forth all of the forms in which it may be made or all of the modes of its use, what we claim'is:- I 1. In a drill, a supporting frame therefor, a two-part spindle, comprising a drive spin-, dle and a drill spindle telesco ically arranged one in the other, said drive spindle being mounted .to rotate without longitudi-, nal reciprocation, inter-engaging means be-, tween said spindles whereby said drill s indle is rotated by said drive spindle an at the same time is 'free to reciprocate longitudinally thereof, a drill on the "end of said drill spindle, a lever pivoted. at one end to the frame forreci rocating the drill s indle, said drill spindle eing pivotally attac ed to said lever and means alined with and atspindlefor rotating the same.

2. Ina drill, supporting means therefor, a two-part spindle comprising a drivespindle and a drill spindle, telescopically arranged one to the other, said drive spindle being mounted to rotate,,inter-engaging means comprising a lug mom of said members and a r longitudinal groove in the other into which rotated by said drive spindle and at the same time is free to be reciprocated longit'udi-- nally thereof, a drill on the end of said drill s indle, a lever mounted on the frame by which the drill spindle may be reciprocated and, a motor attached to the end *of the drive spindle for rotating the same by a direct drive. 1

3, A drill, supporting means therefor, a two-part spindle comprising a drive spindle and a drillspindle telescopically arranged one to the other, said drive sp1ndle .being mounted to rotate, inteR-engagin meansobetween said spindles whereby sai drill s indle is rotated by said drive spindle an at the same time is free to reclprocate longi tudinally thereof, a drill on the end of'said drill spindle, means to'reciprocate said drill spindle and means attached directly to the drive spindle for rotating the same, a motor mounted on the upper end of said drive spindle, and adjustable means for holdin a motor on the upperend of said drive spindle.

4. A drill, having a main supporting rod, arms extending from said rod, sleeves on the ends of the arms, a drive spindle and a drill spindle mounted in certain of said sleeves and in telescopic relation one to the other, said drive spindle being mounted for rotation and said drill spindle being mounted for rotary and reciprocal movement,'1n-

ter-engaging means between said s indles whereby the drill spindle is rotated y said drive spindle and'is at the same t me free to reciprocate relative thereto, a motor having its drive shaft in ahnement wlth and coupled to said drive spindle, and a lever arm for reciprocating said drill spindle.

5. A drill, comprising a vertical rod having a horizontally extending arm adj ustably mounted thereon, a sleeve on the outer end of said arm, a lever pivoted to sa1d arm, having 'a loop intermediate of its ends, a suspension block pivotally and slidably mount ed in said loop, a drive spindle. rotatably mounted in said sleeve, a drill spindle having a drill on its lower end mounted in said suspension block, and adapted to be recipro-o cated by said lever, said drill spindle having abore extending lon itudinally thereof from its upper end into which the drive spindle extends, one of said spindles bein provided with a longitudinal groove, a ug on the other spindle projecting into said id 1 j t h b id d ill i dl i rotatably mounted in the sleeve of said lower said side members, a suspension block having lugs extending-therefrom and into said slots, said drill spindle bein supported by said suspension block and a apted to be reciprocated by said lever, a motor attached to groove, I

said spindles fitting into log:

the upper end of said drivespindle, and an adjustable arm egtending from said vertical rod havin clamping means thereon for clamping the motor in position on sa1d drive spindle.

7. A drilling apparatus comprising a motor having a drivlng spindle, a drill spindle, a platen, an upright, brackets onisa d upright adjustable about a common was and adapted to receive saidmotor, drill spindle and platen respectively, means for c0nne cting said drive spindle and sa1d drill spindle and means for axially reciprocatin said drill spindle toward and from sai platen while said motor is held stationary,

8. A drilling apparatus comprising a motor, a platen, an alined drive and a drillspindle therebetween, an uprlght, brackets fora supporting said motor, spindles and platen, extending from sa1d upright, and mounted thereon forpivotal and longitudinal adjustment independently of each other, means for connecting said drive and drill s indle, and means for reciprocating said rill spindle axially toward and from said right, upper, lower and intermediate. bracket arms extending from said upright and adjustable thereon independently of each other, a motor held between the up er and intermediate arms and a drive spin leconnected thereto, a drill spindle rotatably connected to said drive spindle and a lever on said intermediate arm for axiall recirccating said drill spindle indepen ently of said drive s indle. a 10. A dri ling apparatus comprising an upright, bracket arms extending'there rom a motor fixedly mounted on certain of said brackets, a platen therebeneath fixedly mounted on a bracket arm, a drive spindle on said motor, a drill spindle rotatably connected and in alinement therewith inter- ,mediate of said motor and said platen, and

means for reciprocating said drill spindle. 1

11. A drilling apparatus, com rising an' upright end bracket arms exten ing therefrom, an intermediate bracket arm having an upper and lower branches, sleeves on the ends of said branches, a drive s indle rotatably supported in the sleeve 0 said upper branch, a drill spindle connected wlth said drive spindle and slidably mounted n the sleeve of said lower branch, and a pivoted lever arm engaging the drill spindle intermediate of said branches for reclp'rocatmg .said drill spindle.

12. A drilling apparatus comprlslng an upright, a motor and a driveispindle con- 1 nected therewith, a drill s indle connected in alinement with said rive spindle, a bracket arm adjustable rotatably about said upright, and a platen rotatably adjustable on the end of said bracket arm. L v

13. A drilling aparatus com rising an upright cylindrical bar, means orsupporting said bar, a motor su portedfor rotary adjustment about said a1", a chuck supported ,for rotary adjustment with said motor and movable axia ly relative thereto, a platen supported by said bar below said motor and adjustable both longitudinally of said bar and rotatable about the axis thereof, and

means for moving said chuck relative to said motor toward and from said platen.

14. A drilling apparatus comprising an upright, a motor and platen secured thereto, a bracket arm extending from said up right and adj ustablethereon, said arm comprising anupper and a lower branch, sleeves at the outer, end of-said branches, a drive s indle' mounted for rotation in the upper s eeve and a drill spindle mounted for rotation and axial reclprocation in saidlower branch, the drive spindle bein connected to said drill-spindle and to sai motor'and means mounted on said bracket for reciprocating said drill spindle.

15.- A drilling apparatus comprising a supporting structure, a drive spindle and a drill spindle mounted thereon, motive means for said spindles, a lever ivoted to said support and adapted to axial y reciprocate said drill spindle, said leverbeing provided with a yoke having slotted side members, a suspension block suspended within said yoke and having pins extending into the slots of the side members, the. lever being provided with a slot, and a rojection on said block extending into the s 0t in the lever whereb movement of the suspensionv block at rig tangles to the axis of the spindle is prevented.

16. A. drilling apparatus comprising a motor having a rotor, a .drive spindle in alinement with; said rotor and connected thereto to be driven thereby, a driven spindle in alinement with said drive spindle and movable axially thereof, and work-holding means operatively related to said driven spindle. C

17. A drilling apparatus comprising a motor having a rotor, a drive spindle in alinement with said rotor and connected thereto .to be driven thereby, a driven spindle in alinement with said drive spindle and movable axially thereof, and means for attaching a tool to said driven spindle.

18'; A drillin apparatus comprising an upright c lindrlcal bar, brackets at the opposite ends of said bar for attachment to a post or wall, a motor. supported" by said M rotatably' adjustable thereabout and having the axis of'its rotor parallel with said bar, a platen supported by said bar below the motor and adjustable both longitudinally of said bar and rotatably about the axis thereof, a tool-holding chuck connected to said rotor and adjustable therewith for operation thereby and having its" HERBERT c. LEONARD. HARRY E. WENsTRoM. 

